Isuzu Rodeo UE. Manual - part 643

9J1–9

RESTRAINT CONTROL SYSTEM

Chart B “AIR BAG” Warning Lamp Comes “ON” Steady 

Step

Action

Yes

No

1

1. When measurements are requested in this chart use J–39200

DVM with correct terminal adapter from J–35616–A.

2. Ignition switch “OFF.”
3. Connect scan tool to data link connector, Follow directions as

given in the scan tool instruction manual.

4. Ignition switch “ON.”
5. Request SRS diagnostic trouble code display.

Does scan tool indicate “No Data Received”?

Go to Step 2

Go to Step 3

2

1. Ignition switch “OFF.”
2. Inspect SDM harness connector connection to SDM.

Is it securely connected to the SDM?

Ignition switch

“OFF.”

Replace SDM.

Go to Step 5

Connect SDM

securely to

de–activate

shorting clip in

SDM harness

connector.

Go to Step 5

3

Using scan tool, request SRS data list.

Is “ignition”  more than 9 volts?

Go to Step 4

Ignition switch

“OFF.”

Replace SDM. 

Go to Step 5

4

1. Ignition switch “OFF.”
2. Disconnect SRS coil and passenger air bag assemblies.

Yellow 2–pin connectors located at base of steering column
and behind the glove box assembly.

3. Disconnect SDM.
4. Measure resistance from SDM harness connector terminal “6”

to ground.

Does J–39200 display “0L” (infinite)?

Go to Chart A.

Replace SRS

harness.

Go to Step 5

5

Reconnect all SRS components, ensure all components are
properly mounted.

Was this step finished?

Repeat the “SRS

Diagnostic

System Check.”

Go to Step 5

RESTRAINT CONTROL SYSTEM

9J1–10

Chart C  “AIR BAG” Warning Lamp Does Not Comes “ON” Steady

D09RW002

Circuit Description:

When the ignition switch is first turned “ON”, “ignition 1”
voltage is applied from the “MA01” meter fuse to the “AIR
BAG” warning lamp which is connected to “SRS warning
lamp”, terminal “7”.  The “SRS–1” fuse apply system
voltage to the “ignition 1” inputs, terminals “12”.  The SDM
responds by flashing the “AIR BAG” warning lamp seven
times.  If “ignition 1”  voltage is more than 16 volts, the
“AIR BAG” warning lamp will be still “OFF” solid with no
DTCs set.

Chart Test Description:

Number(s) below refer to step number(s) on the
diagnostic chart:

1. This test decides whether power is available to SDM

warning lamp power feed circuit.

2. This test determines whether the voltage is present

in the warning lamp circuit.

3. This test determines if the malfunction is in the

instrument cluster.

4. This test checks for open in the warning lamp

circuitry.

5. This test isolates the IB04–GRN circuit and checks

for a short in the IB04–GRN circuit to B+.

8. This test checks for a short from the SDM warning

lamp power feed circuit to ground.

9. This test determines whether the short to ground is

due to a short in the wiring.

9J1–11

RESTRAINT CONTROL SYSTEM

Chart C “AIR BAG” Warning Lamp Does Not Comes “ON” Steady 

Step

Action

Yes

No

1

1. When measurements are requested in this chart use J–39200

DVM with correct terminal adapter from J–35616–A.

2. Ignition switch “OFF.”
3. Remove and inspect “MA01” meter fuse to the “AIR BAG”

warning lamp.

Is fuse good?

Go to Step 2

Go to Step 7

2

1. Ignition switch “OFF.”
2. Disconnect SRS coil and passenger air bag assemblies.

Yellow 2–pin connectors located at base of steering column
and behind the glove box assembly.

3. Disconnect SDM.
4. Ignition switch “ON.”
5. Measure voltage on SDM harness connector from terminal “7”

to terminal “6” (ground).

Is system voltage present on terminal “7”?

Go to Step 4

Go to Step 3

3

1. Ignition switch “OFF.”
2. Remove instrument meter cluster.
3. Check for proper connection to instrument cluster at

IB04–GRN terminal.

4. If OK, then remove and inspect “AIR BAG” bulb.

Is bulb good?

Go to Step 5

Replace bulb.

Go to Step 6

4

1. Ignition switch “OFF.”
2. Disconnect instrument meter cluster harness connector.
3. Ignition switch “ON.”
4. Measure voltage on SDM harness connector from terminal “7”

to terminal “6” (ground).

Is voltage 1 volt or less?

Go to Chart A.

Replace SRS

harness.

Go to Step 6

5

1. Install bulb.
2. Measure resistance from instrument meter cluster harness

connector IB04–GRN terminal to SDM harness connector
terminal “7”.

Is resistance 5.0 ohms or less?

Service

instrument meter

cluster.

Go to Step 6

Replace SRS

harness.

Go to Step 6

6

Reconnect all SRS components, ensure all components are
properly mounted.

Was this step finished?

Repeat the “SRS

Diagnostic

System Check.”

Go to Step 6

7

Were you sent here from chart C?

Go to Step 8

Go to Step 1

8

1. Replace “MA01” meter fuse.
2. Ignition switch “ON” wait 10 seconds then ignition switch

“OFF.”

3. Remove and inspect “MA01” meter fuse.

Is fuse good?

Install “MA01”

meter fuse.

Go to Step 10

Go to Step 9

RESTRAINT CONTROL SYSTEM

9J1–12

Chart C “AIR BAG” Warning Lamp Does Not Comes “ON” Steady  (Cont’d)

Step

No

Yes

Action

9

1. Disconnect SRS coil and passenger air bag assemblies.

Yellow 2–pin connectors located at base of steering column
and behind the glove box assembly.

2. Disconnect SDM.
3. Replace “MA01” meter fuse.
4. Ignition switch “ON” wait to 10 seconds.
5. Ignition switch “OFF”.
6. Remove and inspection “MA01” meter fuse.

Is fuse good?

Install “MA01”

meter fuse.

Go to Chart A.

Replace SRS

harness.

Replace“MA01”

meter fuse.

Go to Step 10

10

Reconnect all SRS components, ensure all components are
properly mounted.

Was this step finished?

Repeat the “SRS

Diagnostic

System Check.”

Go to Step 10